Weil-McLain GV90+ manual Monthly, Check boiler interior piping, Check venting system

GV90+ gas-fired water boiler — User’s Information Manual

User maintenance procedures (continued)

MONTHLY

Maintenance

Check boiler interior piping

1.Remove boiler jacket top.

2.Visually inspect for leaks around internal piping, circulators, relief valve and other fittings. Immediately call a qualified service technician to repair any leaks.

Have leaks fixed at once by a qualifed service technician. Continual fresh makeup water will reduce boiler life. Minerals can build up in sections, reducing heat transfer, overheating cast iron, and causing section failure.

Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe damage to boiler and system components can occur, resulting in possible severe personal injury, death or substantial property damage.

Check venting system

1.Visually inspect the flue gas vent piping for any signs of blockage, leakage or deterioration of the piping. Notify your qualified service technician at once if you find any problem.

Failure to inspect the vent system as noted above and have them repaired by a qualifed service technician can result in vent system failure, causing severe per-

sonal injury or death.

Check automatic air vents (if used — use automatic air vents with diaghragm-type expansion tanks only)

1.See Figure 3.

2.Remove the cap from any automatic air vent in the system and check operation by depress- ing valve “B” slightly with the tip of a screwdriver.

3.If the air vent valve appears to be working freely and not leaking, replace cap “A”, twisting all the way on.

4.Loosen cap “A” one turn to allow vent to operate.

5.Have vent replaced if it does not operate correctly.

Figure 3 Automatic air vent

Part number 550-142-055/0411 7